Each year one brewery could have in the region of 450000 gallons of waste water that must be disposed of in a safe and legal manner.
Typically, this waste water will contain a number of pollutants. These include: proteins, suspended solids and industrial grade detergents among other things.
One popular and highly effective method for disposing of this waste water is to plant a reed bed and discharge the waste water into it. This reed bed will be able to digest the pollutants within the waste water and make it safe, by the Environment Agency standards, to discharge the treated water to ground or to a river.
For more information please refer to “The Microbrewers’ Handbook” by Ted Bruning.